Sounder.



T. J. MURPHY.

SOUNDER.

APPLICATION FILED ocr. 2. Ism,A

Patented J uly 2, 1918 INV me Nonms Pzrsns cul. mmm-uma.. wnnmcmn, n. c

.AES PN FF.

THOMAS J. MURPHY, OF ROCHESTER, NEW YORK, ASSIGNOR OF ONE-HALF TO JAMESP. B. DUFFY, OF ROCHESTER, NEW YORK.

SOUNDER.

To all whom t may concern.'

Be it known that I, THOMAS J. MURPHY, a subject of the King of GreatBritain, and a resident of Rochester, in the county of Monroe and Stateof New York, have invented a certain new and useful Sounder; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same, reference being had to theaccompanying drawings, and tothe characters of reference marked thereon,which form a part of this specification.

My invention relates to telegraph sounders and it particularly has forits object to produce a sounding means which may be telegraphicallyoperated by an alternating current. 1t particularly has for its objectto provide a sounding means which will produce a clear and distinctsound and will `not chatter, due to the rebound of the soundino element.

r(ilonstructions containing the invention vmay partake of differentforms. I have shown in the drawing a construction containingtheinvention', it being understood that elements of the construction maybe substituted by equivalent members, and yet such altered constructionswill contain the invention.

The construction selected for purposes of illustration is shown in thedrawings, where- 1n- Figure 1 illustrates a sectional view of thesounder. Fig.'2 illustrates an end view and Fig. 3 illustrates a topview of the sounder, and also, diagrammatically, a system with which thesounder may be connected.

1, Fig. l, is a base for supporting the sounder, having binding posts 2,3 and 4 for connecting the sounder with an external circuit. A containeror housing 5 may be located on the base 1 which will operate as asounding box or element and which may also contain thealternatingcurrent electromagnets 6 having laminated cores 7.

On the top of the housing or container 5 is located a sounding elementor lever 8 formed of non-magnetic material and preferably of aluminum.The sounding element or lever Specification of Letters Patent.

Application fled October 2, 1916.,

Patented July 2, 1918.

Serial No. 123,420.

is supported centrally between two adjustable bearing screws 9 locatedin the yoke 10 10 and the top of the movable sounding element or lever 8is located the spring 26 whichr operates to hold the sounding elementagainst the points of the screws 9 to prevent any loose play that mightexist by reason of wear or inaccurate adjustment of the screws.

A U-member or bracket 11 is located over one end of the sounding elementor lever 8 which is secured to the top of the container 5. The yoke 10is provided with a pair of upwardly extending arms 27. Brackets 14 and apermanent magnet are secured to the arms 27 by means of the screws 28.One of the brackets 14 extends over the U-meinber 11. Steel adjustingscrews 12 are threaded into steel brackets 14. One screw 12 extendsthrough the top of the U-member 11.

`formed of steel or magnetic material, they (,-perateto extend the fieldof the magnet 15 so that the steel screws 12 are permanently magnetizedby the permanent magnet 15. The bar 18 being formed of a magneticmaterial and extending from beneath one screw 12 to the other screw 12,the permeability of the field of the permanent magnet 15 is increasedthereby.

The ends of the lever or sounding member 8 and the magnetic strip18 areprovided with steel screws 16 having flattened heads 17 which strikeagainst the steel screws 12 when the lever or soun ding member 8 istilted one way or the other. The lever or sounding member 8 thuscompletes the magnetic Circuit of the permanent magnet 15, except for ashort distance, at one or the other of, the steel pins 12, when one orthe other of the electromagnets 6 have separated one of the ends ofthesounding member-8 fromfthe stoel pin located in proximity thereto. Vhenone of the magnets G separates the sounding member 8 from one ot' thesteel pins 12 it` overcomes the stickingl effect caused by theattraction between the steel pins 1'2 and 16. The opposite end of thesounding member 8 will be raised and the steel pins' 12 and 16 of thatend of the sounding member will come in contact with each other and thesounding member will be held against any rebound or chattering thatmight otle'ilA wise be proc'lfucec'l,l and the souii'd prodrr'c'ed willbe a clear, definite stroke, notwithstand ing the fact that the soundingmember 8 may bebalancled centrally to permit equal action when either ofits ends are drawn down by one or the other of the magnets'. 1

The lJ-memberY 11 being` located over but one end of the soundingelement or lever 8, a different tone isproduced when the lever strikesthe 'other screw 12, which clearly indicates to the operator thebeginning and the completion of the elemental vpart o1 the Morse signalwhich is transmitted over the line.

The sounder may be used in connection with one of a number of systems.I'have shownn the drawing merely a conventional arrangement for the,operation of the. sounder. In Fig. 3 of the drawings,20 is' a lsourceof alternating current, which is connected to the magnets 6 by means ofthe wire 21,. The return isthrough either one of the branches 22 which'are also connecteda of the electromagnets, a permanent magnet supportedabove the sounding member, the poles of the magnets and the ends of thesounding member having abutting steel screws, a member connected to oneof the steel screws for producing a sound diii'erent from thatlw-hei'rthe other' of thelsteelsorews is struck bythe sounding member.

2. In a telegraph sounder the combination o1 a movable sound producingmember, elec- "omagnets operating on the ends ofthe sound producingmember, a source of alternating current -connected to the electromagnetfor operating the sounding member, a magnetic means for holding thesondmg member to prevent 'chattering at the end of each movement of thesoundermember.

In a sounder the combination oifa-pair4 of eleotromagnets, a pivotallfysupported sounding member operated by the electromagnets, a sou-ree ofalternating current "connected to the electromagnets for moving" thesounding member, a permanent magnet, vthe poles of the permanent magnetterminating near the ends ofthe sounding member to magneticallyyieldingl-y retain the sounding membera'gainst movementproduced by theelectromagnets.

4. In a sounder the combination of a pair ot electromag-nets,l abalanced sounding member pivotally supported above the poiles ot theelectromagnets, a source of alternating current connected to theelectromagnets for moving' thel ksounding member, a .permato the magnets6. A relay or key, directlylggl'nent magnet, the vpoles of theVpermanent sounder. Y I have shown in the drawing a`- key having alaterally. operated-lever 23 which is connected to the source ofcurrent' 20 and which may connect the source 20 through either of thebranches 22 Yby shifting either -to the right or to the left, in whichcase one or the other of the magnets 6 would be operated, which willpull down one or the other sides or arms of the sound'- ing member 8 tocause the opposite member to riseand strike against the steel pin 12,which will hold the balanced sounding memberS to prevent any' recoil orrebound.` Suitable ,induotance may be inserted in the line 21 ifdesired.` An adjustable induction coil 24 shown in the system.

The current ows from the source of current 2O to, the key 23, thence to'one or the otherV ot the contacts of the key, one or the other of thelines 22 and onev or the other of the ele'ctromagnets 7. The currentflows from one or the other of the magnets 7 according ,to which way thelever' ot the key is placed through the line 21 the adjustable inductioncoil 24 to the lsource 20.

I claim:

1. I-na sounder, the combination of a pair of efle'ctromagnets, abalanced sounding member .pivotally Supporteclabovethe poles connected,ymay be used for operating the' lfmagnet and ends oi the sounding memberhaving abutting steel screws for yieldingly holding the sounding member:

1 5. In a sounder the combination of a pivotally supported soundingmember, electromagnets for "operating on theY sounding member, apermanent `magnet having abutting members for limitingthe ,inovementofthe sounding member for yieldingly holding the sounding member, aresonant .body conneoted ,tonne of the abutting 'members' for producinga sound different from that when the otherabutting member is YStruckbythe Sounding mem-ber.A

6. In a sounder the combina-tion of elec tromagnets, a pivotallysupported sounding member formed of diam agnetic material and havingarmatures operated upon by the electromagnets, a permanent magnet, thesounding vmember having a strip of magnetic material located below thepoles of the permanentmember for increasing the'magnetizing eilect'ofthe permanent magnet.

7*. In a Vsounder the combination o'f electromagnets, a pivotallysup-ported Sounding member formed of aluminum and having armaturesoperated upon by the electromagnets, a permanent magnet, the soundingmember having a strip extending across the poiles of the permanentmagnet for increasl .energizing the eleetromagnets, and means foryieldingly holding the pivoted member against Athe attraction of thealternately enle ergized magnets.

In testimony whereof, I have hereunto signed my name to thisspeeieation.

THOMAS J. MURPHY.

ing the magnetizing effect of the permanent magnet.

8. In an alternating current telegraph sounder, a pivoted soundingmember, electromagnets having laminated cores operating on eaeh end ofthe Sounding member, a source of alterna-cmg current for alternately beobtained for five cents each, by addressing the Commissioner of PatentsWashington, D. C.

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